Malicious PDF — malware analysis report

Static analysis result for SHA-256 6064981e1553f329…

MALICIOUS

PDF

80.6 KB Created: 2021-05-20 11:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ae1a6bca82d0f1b003b6490827d35a79 SHA-1: e7c299ff2590b89c908943a8d47dd000d308836f SHA-256: 6064981e1553f329206a91fd24fcca884a162f17db343a99728a0c75097f76aa
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/strik?utm_term=taking+off+quantities+from+drawings+examples+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421329/normal_6055504b23dfb.pdfIn PDF document text
    • https://xifalazixaxidig.weebly.com/uploads/1/3/0/8/130874217/pilofumukefotabebepu.pdfIn PDF document text
    • https://fenivubad.weebly.com/uploads/1/3/4/4/134482284/e005c4.pdfIn PDF document text
    • https://rixemeja.weebly.com/uploads/1/3/4/7/134711448/4090572.pdfIn PDF document text
    • https://wewofubajibopa.weebly.com/uploads/1/3/1/3/131381003/6060883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_60239df4e9148.pdfIn PDF document text
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/bejalebexovu.pdfIn PDF document text
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/3d649f7254d75d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_604fb6a726836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495264/normal_5fdf784dc71b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_5fea0a67b124d.pdfIn PDF document text
    • https://satatemusuk.weebly.com/uploads/1/3/4/3/134311800/sajosalimem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409092/normal_5fe05cca26ef7.pdfIn PDF document text
    • https://jigaposu.weebly.com/uploads/1/3/5/3/135397088/5084492.pdfIn PDF document text
    • https://bomupafevusoze.weebly.com/uploads/1/3/1/4/131407549/1661627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_6037d36652c88.pdfIn PDF document text
    • https://lekaretuzej.weebly.com/uploads/1/3/0/7/130738752/bugipukage_nazetoxuma_zebujerozoziwoz_jebasorexoka.pdfIn PDF document text
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/bakubebobat-dosodolubijo-woroju-remilowomowo.pdfIn PDF document text
    • https://gafewifem.weebly.com/uploads/1/3/1/3/131379815/9302305.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 5660 bytes
SHA-256: f1e6846d3a46e602642fd88b3f4d09522d20c160fcbfe11bc7ec554eeabf7bc2
font_01_sfnt_off00011110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11110 10548 bytes
SHA-256: 029216757fb1f27d7c6be10b8037bfc70c0bc3763d13c66ed7fd6ab8fcafc5aa

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